Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More

Cooling and Heating (1)

Heat Pump (2)

Net I=B=R Capacity (BTU)
I=B=R, also referred to as Net Output or AHRI Capacity, is the rated heat output of a boiler after accounting for combustion efficiency, piping loss, and an extra pickup factor. We recommend sizing steam boilers based on the I=B=R rating.

76000 (1)

82000 (1)

86000 (3)

96000 (1)

134000 (1)

150000 (1)

194000 (1)

330000 (1)

DOE Heating Capacity (BTU)
Also referred to as Gross Output, this is the output of a boiler after accounting for combustion efficiency. We recommend sizing hot water boilers based on the DOE Heating Capacity.

87000 (1)

94000 (1)

99000 (2)

110000 (1)

115000 (1)

154000 (1)

172000 (1)

223000 (1)

379000 (1)

Nominal Heating Capacity (BTU)

1000 (2)

2000 (1)

18000 (1)

60000 (2)

Maximum Input Capacity (BTU)
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.